Cut-off valve for gas or oil burners.



PATENTED FEB. 13, 1906.

A. ASHORAFT. GUT -OFF VALVE FOR GAS OR OIL BURNERS.

APPLICATION FILED JULY 7.1905.

ATTORNEYS an rans ALONZO ASHCBAFT, OF

FORT SMITH, ARKANSAS.

GUT-QFF VALVE FOR GAS OR 0H. BURNERS; I

Specification of Letters Patent.

Application filed July 7,1905. Serial no. 268.669.

Patented Feb. 13, 1906.

To all whom, it may concern:

Be it known that I, 'ALONZO ASHCRAFT, a citizen of the United States, residing at Fort Smith, in the county ofSebastian and State (if Arkansas, have invented a new and Improved Cut-Oif Valve for Gas or Oil Burners, of which the following is a specification.

My invention relates to valves more particularly designed. for cutting off the'fuel or illuminating supply from gas or oil burners. "The object had in view is to provide a valve of the character stated which shall not only be simple in construction and adapted for ready attachment, but after being set or epened for supply of gas or oil to the burner operates to automatically close the valve, cutting off the fuel-supply should the gas or oil cease to burn from whatsoever cause.

The invention consists of the novel and improved cut-off valve shown by the accompanying drawings and hereinafter fully described, the novel features being pointed out in the claims. 2 e

In the drawings, Figure 1 is a view, part in section, illustrating my invention in use. Fig. 2 is a top plan view, part in section, but with the top plate of the valve-case shown removed; and Fig. 3 is an exterior or side elevation of the features illustrated in Figs. 1 and 2. y

In the practice of my. invention I may employ any suitable gas or oil burner A, having an extension B, adapted. for application thereto and preferably to provide a support for, thevalve-casing C.

The valve-casing is constructed with a de tachable top plate D, inlet and outlet passage-ways, respectively, E F, and a suitable ve-chamber G, with the detachable plate D forming its upper wall, as shown in 1. It will be understood that a suitable elsupply pipe leads to the inlet E.

In the chamber G, I arrange a valve H, adapted .for sliding contact with its inner lower side, and provide the valve with a projecting stem I, suitably packed by an ordinary gland J on the casing C.

The stem I is suitably extended beyond the valve H, as at K, providing support for a spring L, arranged in the chamber G and located in rear of the valve, as shown, the springs arrangement and tension being adapted for forcingthe valve to fuel-cuttingoff position over the port M, leading from the chamber. G.

The port M is fashioned into an elongated opening, thereby requiring slight movement sage of the fluid fuel to the burner A.

On the outer side of the valve-case I arrange an arm N and hingedly attach one end ing end P, substantially as illustrated in Fig.

similar attachment to the lever O, as indicated at Q.

It will be further noticed that the lever 0 is extended at one end, forming a suitable handle R, and adapted for pivotal support of an arm S, having its free end fashioned into a suitably-upturned hook T. The hooked end of the arm S is formed, adapted for holding engagement with 2. lug or projectin pin U, on the outer adjacent side of the vaFve-case, as shown in Figs. 2 and 3.

In further carrying out my invention I affix on the leverO one end of a rod V, the same having its point of attachment suitably located between connection of the free ends of the arm N and valve-stem I with thelever', as shown in Fig. 2. The free end of the rod V is provided with screw-thread W, adapted for arrangement thereon of a suitable collar or jam-nuts A.

The burner A may be of any suitable form and construction, and for purpose of illustrating the use of my invention in one adaptation thereof I have shown the burner arranged in a fragmentary combustion portion or flue A of a heating or cooking stove.

In thefiue or portion A of the stove and suitably over the burner A, I arrange an exansion member A, consisting of a tubular end he open endof the expansion-tubeA is projected suitably. through an opening in the portion A of the stove for sup ort and its closed end supported and secure by means the stove portion A substantially as shown in Fig 1. The ex arision-tube A is made cellular or provide with a series ofperforaof minimum body of metal and still retain its stren th and coefficient of ex ansion. Obvious y through means of suc construction of the expansion-tube it is-rendered ex ansively sensitive to action of heat, as from lieat of the burner, and quick ofgcontractiomb cooling eifect of unheated draft of air througli the stove. J

Upon reference to Fig. 1 it will be noticed of a transverse lever 0 to its free or project- 2. The outer end of the valve-stem I has.

ody open at one end and closed at its other 1 of a bolt or rivet A to the opposite wall of tions A in order that it may be constructed of the valve H to cover or close it against pas- IIC that the screw-threaded end of the rod is member shown and described any well-known form of device or means may be employed with the same adapted through expansive and contractive action for effecting necessary operation of the valve H upon lighting the burner and when the same is extinguished or ceases to burn from whatsoever cause.

The construction of my invention will be understood from the above description. 0 eration may be briefly described as follows:

e valve H is moved. to the open position illustrated for passage of the fluid fuel to the burner by adjusting the handle end R of the lever O, as indicated by the arrow in Fig. 2. This action compresses the s rin L to increased tension against the va ve and the latter is held at open position by turning upwardly the arm S to position with its hooked end T into engagement with the fixed stud or pin U. The jam-nuts are adjusted to position on the rod V sli htly free from contact with the adjacent en of the expansion-tube, substantially as shown in Figs. 1 and 2. It is apparent that u on lighting the burner heat therefrom wil cause expansion of the tube or thermal member A and adjustment of its free end to shoving engagement with the jam-nuts A. The am-nuts being located on the rod V, adapted to be engaged by the free or movable end of the thermal tube member A it is apparent only sli ht further. expansion of the thermal mem er will operate to shove the rod V endwise, and through'its connection with the lever O and the latters attachment to the arm N pressure will be applied to the projecting end of the stem 1, ad usting it endwise, and thereby imparting sli ht rearward adjustment from the part M o the valve H. Now such operation will remove frictional holding engagement of the hook T with the stud U, permitting the arm S to dro by gravity, as indicated by the arrow in i 3, from engagement with the stud U. So ong as the burner A remains lighted the parts Wlll be held adjusted and the valve secured at its open position by the locking thereof or the expanded condition of the thermal member A Should the fluid fuel cease to flow, however, or the burner go out from whatsoever cause, it is apparent that the thermal member will be qruckly cooled, causing contraction thereof, by drafts of air flowing through the stove member. Now upon contracting action of Its the thermal member its free end will be drawn from holding engagement against the jam-nuts, and with the rod V thus set free tension of the spring L will force the valve H forward over the port M, and thus out off supply of fuel flowing through the-port M, passage-way F, and the tube B, leadin to the burner A. Thus it will be seen t at my novel and improved cut-ofi valve for gas or oil burners is made not only automatic in action to cut off the fuel-supply should the burner go out, but by reason of the eculiar construction and combination of eatures rendered sure of o eration and made adapted to be set by sli ht adjustment of the jamnuts A for not 0 y cutting off the supply of fuel should the burner go out, but adapted for similar automatic operation upon reduction of the fuel-supply to the burner.

It maybe well to add in further description of the adaptabilities of my invention that the valve-cutting-oifaction may be regulated by simple adjustment of the jam-nuts, so that it will be ermitted to act, cutting 'ofi the supply of fue upon reduction of its supply or dueto the burner going out from whatsoever cause.

I have hereinbefore stated that the thermal member A may be in the form of any suitable thermal means. In further ex lanation of such statement I desire to say t at in the appended claims the generic term thermal member wherever appearing is intended to comprehend any form or ty e .of thermal means adapted through suita le intermediate devices for causing action of the lever O,

substantially as hereinbefore fully described,

for eflecting adjustment of the valve H to plllltlting-oif position of the flow of the fluid Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination with a fluid-fuel burner, of a reciprocating valve, a tubular thermal member, means connecting the thermal member with the valve, and means whereby the thermal member and valve connecting means may be secured, said securing means being adapted to release the valve upon expansive action of the thermal member, substantially as described.

2. The combination with a fluid-fuel burner, of a reciprocating valve, a tubular thermal member, means connecting the valve with the thermal member, means whereby the valve is released, means whereby the valve is adjusted to cutting-off position, and means adapted to be set ga ing operative action of the expansive mem er, substantially as described.

3. The combination with a fluid-fuel. burner, of a tubular thermal member, a casing having a chamber and passage-ways leading to the burner, a reciprocating valve in the casingrchamber, having adjustment to open and cutting-E position, a stem extend .burner, of a thermal member, a casing hav ing a chamber and passage-ways leading to the burner, a valve in said chamber, having a projecting stem, a spring adapted for forcing I the valve to cuttin -oii position, a lever having suitable pivota support at one end, and attachment to the valve-stem, a rod having connection with the lever, at a point between its pivotal supportand the point of the valvestem connection, the rod being extended suit able for o erative connection with the thermal mem er, and an arm supported on the free end of the lever, havin an u turned hooked end, with the latter a a ted or connectionwith a fixed device on t e valve-casing, whereby the valve may be secured at open adjustment, and the hooked end of the arm be automatically disengaged, u on expansive action of the thermal .mem er and operation ;of' the intermediate devices, substantially as described.

5. The combination with a fiuid'efuel burner, and a cut-off valve in its fluidv-fuelsupply passage-way, having a suitable stem,

' the valve being yieldin ly retained at cutting-off position, of a tu 'ular thermal member supported to receive heat from the burner, a lever aving pivotal support at one end, and

near the other end, attachment with the valve-stem, a reciprocal rod having one end attached to the lever, between the oints of its pivotal support and connection t erewith of said valve-stem, and a collar on the reciprocal rod, the free end of said rod being extended into the adjacent open end of the tubular thermal member, substantially as described.

6. The combination with a fluid-fuel burner, and acut-ofi valve in its fluid-fuelsupply passage-way, having, a suitable stem, the valve being yieldingl retained at cuttingofilposition, of a tubu ar thermal member sup orted ada ted for receiving heat from the burner, an having its body suitably perforated, a lever having pivotal support at one end, and near the other end, attachment with the valve-stem, a reciprocal rod having one end attached to the lever, between the points of its ivotal support and connection therewith o aid valve-stem, and jam-nuts on the reciprocal rod, the free end of said rod being extended into the adjacent open end of the tubular thermal member, substantially "as described.

7. The combination witha fluid-fuel burner and 5a yielding valve in the fuel-sup-' ply passage-way, of a thermal member, conslsting of a tubular body, means connecting the thermal member with the valve, means for holding the valve open, adapted for auto- .matic'release thereof, and an adjustable device interposed between the thermal member and valve devices, whereby to time and 'age action of the valve, substantially as descri ed. ALONZO ASHCRAFT. Witnesses;

- GEo. H. LYMAN, T. I. GREENSTREET 

